Solid catalyst component and catalyst for olefins polymerization

a technology of solid catalyst and olefin, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, chemical/physical process, etc., can solve the problems of large quantity of hydrogen, reduced productivity, and limited safety of pressure reactor in terms of adaptable amount of hydrogen, so as to achieve high stereoregularity, high yield, and high responsiveness to hydrogen

Inactive Publication Date: 2004-08-03
TOHO TITANIUM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

When the dialkoxymagnesium is used as the component (a) in the invention, the alkoxymagnesium is in a form of granules or powder, which may also be used in an amorphous or spherical shape. For example, when the dialkoxymagnesium is used in a spherical shape, it is possible to obtain polymer powder which has a better granular form and narrower particle size distribution. Thus, handling and operability of the produced polymer powder during polymerization procedure are improved, and such a problem as obstruction, etc., caused by fine powder contained in the produced polymer powder can be solved.
When an olefin is polymerized in the presence of a catalyst for polymerization of olefins formed in the present invention, it is possible to produce an olefin polymer in a much higher yield, while high stereoregularity being retained, than with the catalyst used in the prior art. High responsiveness to hydrogen can also be realized.

Problems solved by technology

When low molecular weight polymers are produced, i.e., in order to produce polymers of high melt flow rate, a large quantity of hydrogen is usually added, though there is a limitation in a pressure reactor in terms of safety as well as in an adaptable amount of hydrogen.
In order to add a much more amount of hydrogen, the partial pressure of monomer to be polymerized has to be decreased, but decrease of the partial pressure is accompanied by decrease of productivity.
Additionally, use of a large amount of hydrogen may bring about a problem of cost.
In the above-mentioned prior art, however, it is not sufficient to solve such a problem.

Method used

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  • Solid catalyst component and catalyst for olefins polymerization
  • Solid catalyst component and catalyst for olefins polymerization
  • Solid catalyst component and catalyst for olefins polymerization

Examples

Experimental program
Comparison scheme
Effect test

preparation 1

In a 2.0 liter three-necked flask equipped with a refluxing condenser was introduced 25.0 g of 4-methylphthalic acid and 100.0 g of neopentyl alcohol, to which was slowly added 18 ml of sulfuric acid at 66.degree. C., and the mixture was refluxed at a temperature of 115 to 125.degree. C. for 2 hours. After cooling, the reaction mixture was moved into a separating funnel containing 150 ml of distilled water. The flask was washed with 200 ml of diethyl ether, and the ether was poured into the separating funnel. After flashing operation, removal of the aqueous layer (lower layer) was repeated 3 times. Then, 150 ml of 5% sodium hydrogen carbonate aqueous solution was added, and after flashing operation made, the aqueous layer showed pH 7 to 8. After removal of the aqueous layer, the organic layer was washed with 300 ml of saturated brine and then with 150 ml of distilled water. After removal of the aqueous layer, the ether layer (upper layer) was placed in an Erlenmeyer flask and dried ...

preparation 2

In a 2.0 liter three-necked flask equipped with a refluxing condenser was introduced 50.0 g of 4-bromophthalic acid and 100.1 g of neopentyl alcohol, to which was slowly added 36 ml of sulfuric acid at 69.degree. C. The mixture was refluxed at a temperature of 115 to 125.degree. C. for 3.5 hours. After cooling, the reaction mixture was moved into a separating funnel containing 600 ml of distilled water. The flask was washed with 500 ml of diethyl ether, and the ether was poured into the separating funnel. After flashing operation, removal of the aqueous layer (lower layer) was repeated 3 times. Then, 250 ml of 5% sodium hydrogen carbonate aqueous solution was added, and after flashing operation made, the aqueous layer showed pH 7 to 8. After removal of the aqueous layer, the organic layer was washed with 300 ml of saturated brine and then with 150 ml of distilled water. After removal of the aqueous layer, the ether layer (upper layer) was placed in an Erlenmeyer flask and dried on a...

preparation 3

In a 2.0 liter three-necked flask equipped with a refluxing condenser was introduced 24.0 g of 3-fluorophthalic acid and 99.6 g of neopentyl alcohol, to which was slowly added 18 ml of sulfuric acid at 62.degree. C. The mixture was refluxed at a temperature of 115 to 125.degree. C. for 2 hours. After cooling, the reaction mixture was moved into a separating funnel containing 300 ml of distilled water. The flask was washed with 210 ml of diethyl ether, and the ether was poured into the separating funnel. After flashing operation, removal of the aqueous layer (lower layer) was repeated 3 times. Then, 150 ml of 5% sodium hydrogen carbonate aqueous solution was added, and after flashing operation made, the aqueous layer showed pH 7 to 8. After removal of the aqueous layer, the organic layer was washed with 150 ml of saturated brine and then with 150 ml of distilled water. After removal of the aqueous layer, the ether layer (upper layer) was placed in an Erlenmeyer flask and dried on anh...

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Abstract

Solid catalyst components and catalysts which contain (a) magnesium compound, (b) titanium tetrachloride, and (c) a phthalic acid diester or its derivative are useful in the synthesis of olefin polymers in high yields. Particularly, propylene polymers can be obtain in very high yields while retaining high stereoregularity.

Description

The present invention relates to a solid catalyst component and catalyst for polymerization of olefins, which have a high responsiveness to hydrogen and can afford olefin polymers in very high yield while retaining high stereoregularity.So far it has been known that some solid catalyst components used in polymerization of olefins contain magnesium, titanium, an electron donor compound and halogen as essential components. A large number of methods for olefin polymerization by polymerization or copolymerization of propylene, in the presence of a catalyst for olefin polymerization comprising the above solid catalyst components, an organoaluminum compound and organosilicon compound, have been proposed. For example, Japanese Unexamined Patent Publication No. (herein after referred to as JP-A) 57-63310 / 1982 and JP-A 57-63311 / 1982 disclose a method for polymerization of olefins of 3 carbon atoms or more, in which a combined catalyst comprising solid catalyst components containing a magnesi...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): C07C69/80C07C69/00C08F10/00C08F110/06C08F110/00C08F4/654
CPCC07C69/80C08F10/00C08F4/651C08F4/6548C08F110/06C08F2500/12C08F4/654
Inventor TASHINO, KUNIHIKOSUZUKI, YUKIHIRONISHIYAMA, ISAOGAWA, HAYASHIYOSHIDA, TAKUMAHOSAKA, MOTOKISATO, MAKI
Owner TOHO TITANIUM CO LTD
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